Just when I got the gist of OO in Python [to-do, try to find the specific info that most helped me], here comes Go with its implementation. Can't say much more right now, because I gotta absorb the following, and spend some time wrapping my head around interfaces, etc.
Variant Types in Golang
http://lawlessguy.wordpress.com/2013/04/15/variant-types-in-golang/
http://jordanorelli.tumblr.com/post/32665860244/how-to-use-interfaces-in-go
http://blog.carlsensei.com/post/42828735125
In American Scientist, there's this essay, which includes a bit about OOP. [how do I think it's relevant for Go?]